#include <bits/stdc++.h>
using namespace std;
bool visited[10];
 
bool check(int n)
{
    for (int i = 0; i <= 9; i++) visited[i] = false;
    while (n != 0)
    {
        if (visited[n%10] == true) return false;
        visited[n%10] = true;
        n /= 10;
    }
    return true;
}
 
int main()
{
    freopen("SODOCLAP.inp","r",stdin);
    freopen("SODOCLAP.out","w",stdout);
    int n;
    cin >> n;
    while (check(n) == false)
        n++;
    cout << n;
    return 0;
}

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